an idea to reduce boost creep?

[Dub-Se7en]

i had an idea this morning when driving to work. :homer:

what if you plumbed a Manual Boost controller into a vacuum pipe on the inlet manifold? (as an example to bov takoff)

this would allow you to reduce the boots level by bleeding off some of the boost pressure.

thinking about it you could probably even use the factory hi/lo solonoid to do this.

may not be a means to an end but would certainly help.

thoughts?

 

[Dub-Se7en]

another idea was to move the actuator arm closer to the pivot point of the wastegate, allowing it to open further

 

[sx_turbo]

hmmm, thought about boreing out the housing more and fitting a bigger flap?

 

[Dub-Se7en]

the idea wasn't really for my benefit (although mine does creep) it was more for the more standard starlets in the club.

 

[Corey_gt]

Would restricting the amount of air
going in on the intake help like
squeezing the pipe to the air filter?

 

[durmz]

Would restricting the amount of air
going in on the intake help like
squeezing the pipe to the air filter?

probly, wrapping up the air filter works too, that restricts air obvs needed an aftermarket filter to do tht though

 

[starletgt.neal]

probly, wrapping up the air filter works too, that restricts air obvs needed an aftermarket filter to do tht though

or just something put over the top of the panel filter for standard..thats abvious

but the top two ideas ime not sure when you think about it if you put a bleed valve on the inlet mani then that has got to help a lot surely? along with restricting air flow you should be helped a fair bit?

 

[Dub-Se7en]

the bleed valve idea should work as it's just creating a boost leak. how this affect spool time though i'm not sure.

 

[CMR]

It might be possible to set an EBC to 'leak' lets say at a certain rpm when the creep happens, this wouldnt effect spool time... i think anyway

Regarding the wastegate lever, thats a good idea. Mine is creeping at the moment on a hybrid where the gate cant be ported any further really and something in my mind is telling me the gate isnt opening as far as it could.

Are you going to try the gate idea mate?

 

[Dub-Se7en]

It might be possible to set an EBC to 'leak' lets say at a certain rpm when the creep happens, this wouldnt effect spool time... i think anyway

Regarding the wastegate lever, thats a good idea. Mine is creeping at the moment on a hybrid where the gate cant be ported any further really and something in my mind is telling me the gate isnt opening as far as it could.

Are you going to try the gate idea mate?

deffo trying the gate idea, if you look at how far a HKS actuator actually opens the wastegate, it's not much! even a few extra mm will make a difference

 

[sx_turbo]

the idea wasn't really for my benefit (although mine does creep) it was more for the more standard starlets in the club.

ahhh i see sorry, i'll pipe down lol

 

[ChrisGT]

Moving the pivot point of the wastegate flap looks like a good idea! Should allow the flap to be opened that few more mm, which might help expel a greater volume of exhaust gases! Let us know how you get on mate!

 

[CMR]

deffo trying the gate idea, if you look at how far a HKS actuator actually opens the wastegate, it's not much! even a few extra mm will make a difference

let me know if it works for your creep bud, i might have to do it on mine too

 

[Toby@ToyTuning.com]

It might be possible to set an EBC to 'leak' lets say at a certain rpm when the creep happens, this wouldnt effect spool time... i think anyway

Regarding the wastegate lever, thats a good idea. Mine is creeping at the moment on a hybrid where the gate cant be ported any further really and something in my mind is telling me the gate isnt opening as far as it could.

Are you going to try the gate idea mate?

Have you checked to see if the w/gate flap is clear of the d/pipe when it opens? What d/pipe are you running as I know Hybrid once discovered this problem where the flap didn't have enough clearance to fully open resulting in creep, I'm not sure what downpipe it was maybe custom.

A lot of creep will be down to inlet track size and air filter selection as well, in my findings filters up front seem to produce a ram air effect when open ended pending on their projection angle, as on the same setup their is no creep running the compressor side bare.

How much are you guys porting your w/gates out too?

T

 

[Dub-Se7en]

ahhh i see sorry, i'll pipe down lol

pipe away mate

 

[CMR]

Have you checked to see if the w/gate flap is clear of the d/pipe when it opens? What d/pipe are you running as I know Hybrid once discovered this problem where the flap didn't have enough clearance to fully open resulting in creep, I'm not sure what downpipe it was maybe custom.

A lot of creep will be down to inlet track size and air filter selection as well, in my findings filters up front seem to produce a ram air effect when open ended pending on their projection angle, as on the same setup their is no creep running the compressor side bare.

How much are you guys porting your w/gates out too?

T

Well thats one issue im thinking about too, originally I thought it was just the wastegate latch was hitting the decat gasket (it was) so i dremeled the edge of the gasket away but now I think the actuator 'pin' that goes through the latch still could be catching on the body of the decat.

The wastegate flap moves freely by hand without the actuator connected so its not getting stuck internally.

I have a tong turbo hybrid, sps decat and one of your actuators toby.

Feel free to drop me an email toby with any advice to save cluttering this thread.

 

[monka]

is it not possible to get a wastegate type thing in the inlet tract?

like a dump valve that opens, say your running 1 bar, the 'thing' see's pressure riswe above 1 bar, so lets access air out? sort of the offspring of a dumpvalve and a wastegate making love. lol

 

[rox]

could do with coming up with a solution to this as my car only has an exhaust and air fliter and creeps like mad ive got the adjustable actuator set to only around 0.6 to allow me more revs before it gets near a bar

has anyone ported the stock wastgate with a dremel or such means?

 

[dantheman]

the best way to beat it is having a bigger wastegate flap or external wastegate.. the problem is when you raise the boost the compressor is drawing in air quicker than it can regulate it through the wastegate. the wastegate exit size is the core of the problem.

i fitted a hybrid ct9 to my misses starbo with the airfilter mounted behind the grill and it was getting boost creep pretty bad, making a longer air intake pipe to mount near the battery stopped it completly..

so you can either, restrict the air getting into the turbo, or de restrict the gas getting out.. they are the most effective methods.

 

[Dub-Se7en]

the best way to beat it is having a bigger wastegate flap or external wastegate.. the problem is when you raise the boost the compressor is drawing in air quicker than it can regulate it through the wastegate. the wastegate exit size is the core of the problem.

i fitted a hybrid ct9 to my misses starbo with the airfilter mounted behind the grill and it was getting boost creep pretty bad, making a longer air intake pipe to mount near the battery stopped it completly..

so you can either, restrict the air getting into the turbo, or de restrict the gas getting out.. they are the most effective methods.

agreed, but was thinking of methods that the average joe could do rather than dismantling the turbo and having it bored out and a bigger penny fitted.

as you say, restricting the intake worked for me at the expense of some response time and it made the car sound na too